<?php
/**
 * Created by PhpStorm.
 * User: xirui
 * Date: 2016/9/21
 * Time: 20:17
 */
header('Content-type;text/html;charset=utf-8');
const DISCOUNT = 0.8;
$fruit1='香蕉';
$fruit2='苹果';
$fruit3='橘子';
$fruit1_num = 2;
$fruit2_num = 1;
$fruit3_num = 3;
$fruit1_price = 7.99;
$fruit2_price = 6.89;
$fruit3_price = 6.99;
$fruit1_total = $fruit1_num * $fruit1_price;
$fruit2_total = $fruit2_num * $fruit2_price;
$fruit3_total = $fruit3_num * $fruit3_price;

$total=($fruit1_total + $fruit2_total + $fruit3_total)*DISCOUNT;
$str = "<table>";
$str .="<tr><td>$fruit1</td><td>$fruit1_num</td><td>$fruit1_price</td></tr>";
$str .="<tr><td>$fruit2</td><td>$fruit2_num</td><td>$fruit2_price</td></tr>";
$str .="<tr><td>$fruit3</td><td>$fruit3_num</td><td>$fruit3_price</td></tr>";
    $str.="<tr><td colspan='3'>商品折扣：<span>". DISCOUNT."</span></td></tr>";
     $str.="<tr><td colspan='3'>打折后购买商品总价格：{$total}元</td></tr>";
    $str .="</table>";
    echo $str;
?>